Improvement in rolling-mills



`To all whom it may concern:

UNITED su.turnsN PATENT/OFFICE.

JOSEPH Janson, or rnmnnnnrnm, PENNSYLVANIA. j

LMPRVEMENT vIN ROLLING-MILLS.

` october 28,1815.

' The object of my invention is to draw between a pair of rolls circular or segmental plates with a bevel on oneside gradually decreasing the thickness from a center circle to the edge, as is used in the manufacture of shingle and veneering circular saws, which, previous to my invention, were. rolled of one thickness to the edge, and the metal ground away to form lthe bevel, which is a waste of metal, an expense, and loss of time;` C lne inventiouousists, in the combination of a pair of rolls, (one or both eccentric,) an adjustable guide andstop, and a center pin when rolling a circular plate, and one or more pins when rolling a segment-plate, all arranged to operate substantially as herein described.

Figure 1 represents a front view of a pairpf housings and rolls with my improvements. Fig. v2 is a sectional side view of` the same on Vtheline a: zc. l

'Other figures are parts in detail.

Similar letters in the drawings refer to like parts.

A represents the housings, and are constructed, asis usual, with bearingsfor `the rolls. The bearings for the top roll Bare supported by springs, or they may be supported by a weighted lever, as' is frequently used. The roll B is'made of a true circle. '.lhe roll C is in the form of an eccentric or cam, as

is shown in Fig. 2. b is a rest, which is fixed a slot, d, in the; housings'A. To this rest is fixed, by two screw-bolts, c 6, Fig.' 1, the

stop-gage a, which is adjustable by' means of The operation of my invention is as follows:

i The plates and segments have previously been Vin rolling the p rolled to their proper thickness for the center ofthe saw. A hole is drilled or punched in the center for the piu p, and, in case of a segment, itis for the pin or pins. to a red heat, the operator grasps 1t with a pair of tongs and rests it on the heads of the i screw-bolts e e aud'guide a, when the pin p is dropped in the center hole and the plate is pushed between the rolls till the pinp is stopped by the guide a. `Power being applied to the roller C, it revolves in the directionof the arrow, and vthe edge of the plate being pressed between the two rollers it will be forced toward the operator, and the plate will be drawn down gradually to the edge, it be ing turned around by the operator, presentinga different part of the plate for each operation, gradually feeding the rolls closer to# gether by Ineausof the screwse s, andthe -plates will be rolled or drawn to the form, as

is shown in the drawings. t

1t 'will be noticed that the bevel is all on one side o f the plate, which bevel is formed by the bottom roll. The length of this bevel mmay be varied by the form of bottom roll and adjustment of the stop-guide a.`

' lwo eccentric rolls may be used; but they will require .to be geared' together by spurt gearing, and the bevel will be formedon both sides of the plates in rolling them, and they may be heated and the bevel hammered allto one side; but I think one eccentric roll pref.

erable, which, if desired, may be geared to the plaiuor top roll, or driven by friction, as

shown in the drawings.

During the forming or drawing of the bevelsitinay be necessary to heat'the plates more than once, all of which will be understood by any one accustomed to drawing steel plates for circular saws.

4In rolling the segments it may be desirable to' have a pimp, in each of the holes of the segment; The guide-stop a is so constructed that one or more pins can be used at one time, and atestheycanbe shifted under different part s,o f Athe rolls, so that thegolls will we'a even, for,@if rolled in one place, it would make them wear uneven? and hollow across the face. This is prevented by sh1t` cut to the proper shape, and the number of holes desired are drilled or punched The plate `is then heated ing the plates by the operator during the rolllng.

I am aware that many parts described in my specification are not new; but

What I claim as new is- The combination of a pair of rolls, on'e or both eccentric, with the adjustable guide or stop a and center pin or pins p, as shown amily described, and fr the above purpose.

W. N MARCUS, J oHN SHINN. 

